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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 114 days






2. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






3. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






4. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






5. Birthing process (termination of gestation)






6. 30-38 hours after estrus cycle begins






7. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






8. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






9. ~305 days (altough often longer due to breeding difficulties)






10. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






11. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






12. What helps regulate spermatogenesis?






13. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






14. 1-2 days






15. Actual heat cycle (period)






16. Start of the reproductive tract for the female. located outside of the body






17. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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18. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






19. Can survive ~7 days in cow. vast majority <48 hours






20. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






21. The more stressed out the male is - the less sperm he is going to produce






22. 283 days






23. (FSH) causes egg to mature in females






24. Luteolysis happens because of the ____________ hormone






25. When are dairy cattle dehorned?






26. The more stressed out the male is - the less sperm he is going to produce






27. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






28. (LH) causes female's egg to break (her period)






29. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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30. 26 hours after estrus begins






31. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






32. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






33. Animals which have only one estrous cycle (ex: dog - fox)






34. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






35. Milk is 15% ________ and 85% __________.






36. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






37. Not under a timeline - cow can not be sold as steak






38. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






39. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






40. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






41. Luteolysis happens because of the ____________ hormone






42. Milk ~305 days - dry 60 days prior to calving






43. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






44. (male) pushes the testes outward toward the legs for a cool-down off of the body






45. 16-20 hours






46. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






47. Scar tissue plugs up chambers of udder






48. Birthing process (termination of gestation)






49. Implies the amount of estrogen production






50. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat